VIPER^nano: Improved Live Cell Intracellular Protein Tracking

Area of Science:

• Cell biology
• Biotechnology
• Live cell imaging

Background:

• Tracking intracellular proteins is crucial for understanding cellular processes.
• Current methods like fluorescent protein fusions can alter protein function due to steric bulk.
• Exogenous probes struggle to access intracellular targets.

Purpose of the Study:

• To develop a novel platform for live cell imaging of intracellular proteins.
• To overcome the limitations of existing protein tracking techniques.
• To enable accurate spatial and dynamic tracking of proteins with minimal interference.

Main Methods:

• Developed the VIPERnano labeling platform using a CoilE peptide fusion tag.
• Engineered hollow gold nanoshells (HGNs) for delivering a fluorescently labeled CoilR peptide.
• Utilized light-activated release of the CoilR peptide from HGNs for cellular labeling.

Main Results:

• Successfully demonstrated light-activated VIPERnano delivery and labeling of intracellular proteins.
• Verified labeling in proteins localized to mitochondria and the nucleus.
• Showcased reduced steric bulk compared to traditional fluorescent protein fusions.

Conclusions:

• VIPERnano offers a promising new approach for live cell imaging of intracellular proteins.
• The technology allows for precise tracking of protein dynamics and localization.
• This method minimizes perturbation of native protein function, advancing cell biology research.